Introduction:For welding low alloy CrMo steel structures,which work temperature is below 520℃. Such as boiler pipes,petroleum thermal cracking equipment,etc.
Standard & Typical Chemical Composition of Deposited Metal (%)
|
Chemical Composition
|
C
|
Mn
|
Si
|
S
|
P
|
Cr
|
Ni
|
Mo
|
V
|
Cu
|
Other
|
|
Specification
|
0.05-0.12
|
≤0.90
|
≤0.80
|
≤0.03
|
≤0.03
|
1.00-1.50
|
-
|
0.40-0.65
|
-
|
-
|
-
|
|
Actual result
|
0.08
|
0.73
|
0.24
|
0.009
|
0.013
|
1.31
|
0.52
|
Standard & Typical Mechanical Properties of Deposited Metal
|
Test Item
|
Postweld Condition
|
Yield Point ReL (MPa)
|
Tensile Strength Rm(MPa)
|
Elongation A4(%)
|
Akv Value (J)
|
|
Specification
|
PWHT
690℃X1h
|
≥460
|
≥550
|
≥19
|
-
|
|
Actual Result
|
540
|
640
|
22
|
25℃ 170
|
Size and Current (AC≥70V or DC +)
|
Dia.(mm)
|
2.0
|
2.5
|
3.2
|
4.0
|
5.0
|
|
Length(mm)
|
300
|
300
|
350
|
400
|
400
|
|
Current(A)
|
40-70
|
60-90
|
90-120
|
140-180
|
170-210
|
